Seeking a timeline of feature introductions by HP

[ijabbott]

(06-17-2020 10:48 AM)Vincent Weber Wrote:  First (Yellow) LCD was the Casio fx-501p/502p (1978, one year before the HP-41C). They had been some LCD attempts circa 1972/1973 but nothing really worth of note.

The first with a Twisted Nematic (TN) LCD (rather than the early Dynamic Scattering Mode (DSM) LCD) was the Casio Pocket-LC from 1975, at least according to http://www.vintagecalculators.com/html/c...et-lc.html. It's just a four-banger though.